Basterretxea Andere, Jehanno Coralie, Mecerreyes David, Sardon Haritz
POLYMAT, University of the Basque Country UPV/EHU, Joxe Mari Korta Center, 20018, Donostia-San Sebastián, Spain.
Ikerbasque, Basque Foundation for Science, E-48011, Bilbao, Spain.
ACS Macro Lett. 2019 Aug 20;8(8):1055-1062. doi: 10.1021/acsmacrolett.9b00481. Epub 2019 Aug 9.
Organocatalysis provides a powerful alternative in many polymerization reactions and nowadays has become a valuable tool for polymer chemists. The key reason for transitioning to organocatalysts is not only their ability to be effectively removed from resultant products, but also, their potential to exquisitely control the catalytic activity and selectivity of the polymerization processes. While organocatalysis has been largely implemented in research laboratories, its use in industrial bulk polymerization processes is still scarce. This is mostly due to the poor thermal stability of organocatalysts at temperatures (150-250 °C) usually employed for industrial polymerizations. In this Viewpoint, we highlight the recent advances of the use of acid-base ionic mixtures in high temperatures bulk polymerization reactions. First, we will focus on the synthesis, characterization, difunctional catalytic properties, and thermal stability of these acid-base mixtures. Afterward, we will emphasize the recent literature describing their use in chain growth and step-growth polymerizations. Moreover, the highlight will also draw attention to recent efforts in the use of these acid-base mixtures in polymer recycling by means of depolymerization.
有机催化在许多聚合反应中提供了一种强大的替代方法，如今已成为聚合物化学家的一项重要工具。转向有机催化剂的关键原因不仅在于它们能够有效地从最终产物中去除，还在于它们能够精确控制聚合过程的催化活性和选择性。虽然有机催化在研究实验室中已得到广泛应用，但其在工业本体聚合过程中的应用仍然很少。这主要是由于有机催化剂在通常用于工业聚合的温度（150 - 250°C）下热稳定性较差。在本观点文章中，我们重点介绍了酸碱离子混合物在高温本体聚合反应中的最新进展。首先，我们将关注这些酸碱混合物的合成、表征、双功能催化性能和热稳定性。之后，我们将强调描述它们在链式增长和逐步增长聚合反应中应用的近期文献。此外，本亮点还将关注近期在通过解聚将这些酸碱混合物用于聚合物回收方面所做的努力。
